End-to-end encrypted

Signal Is Great. Teams Need More Than Messaging.

Both Phound and Signal are end-to-end encrypted. Here's where they diverge.

Phound is an end-to-end encrypted business communication platform that combines calling, messaging, video meetings, and AI in a single app. Unlike Signal — which focuses on private consumer messaging using the open-source Signal Protocol — Phound is built for teams that need to call clients outside the app, host video meetings, get AI call summaries, and manage team communication from a single business phone number. Phound Basic is free with no phone number required to sign up. Phound Pro ($9.99/month) adds a real PSTN number and advanced AI. Phound Business ($18/user/month) adds team management and shared lines.

Signal set the standard for private, encrypted messaging — and for personal use, it's still the best. Phound is what you reach for when your team also needs a real business phone number, video meetings, AI call summaries, and the ability to call a client who isn't on the app.

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Side by side

Phound vs. Signal — Side by Side

Feature	Signal	Phound Basic (Free)	Phound Pro ($9.99/mo)
E2E encryption	✅ Signal Protocol (open source)	✅ Proprietary	✅ Proprietary
Messaging	✅	✅ P2P	✅ + SMS to any number
Voice calls	✅ App-to-app only	✅ App-to-app only	✅ + call any phone (PSTN)
Video calls / meetings	✅ Small groups	✅ Up to 100 people	✅ Up to 500 people
Free plan	✅ Fully free (nonprofit)	✅ Free forever	—
No phone number to sign up	❌ Phone required	✅ Email only	✅ Email only
Open source	✅	❌ Proprietary	❌ Proprietary
Call anyone (no app needed)	❌	❌	✅
Real business phone number	❌	❌ Add-on $4.95	✅ Included
AI call summaries	❌	⚠ Basic meeting AI	✅ Full AI suite
Voicemail transcription	❌	❌	✅
SMS to non-users	❌	❌	✅ N. America
Team admin controls	❌	❌	Business tier

Want the numbers on each plan? See full plan details →

Credit where it's due

Where Signal Is the Right Tool

Signal is the gold standard for private consumer messaging. Use it when:

You need the most widely trusted, independently audited open-source encryption
You're communicating with individuals who already have Signal — family, friends, journalists, activists
Privacy is the entire priority and business features aren't needed
You want a 100% free, nonprofit-backed app with no business model tied to your data

The gaps at work

Where Teams Outgrow Signal

Signal is built for private conversations between individuals. When work enters the picture, the gaps show up fast:

You can't call a client who isn't on Signal. Signal calls work app-to-app only. If your client uses a regular phone, you can't reach them from Signal without a separate phone system.
No video meetings designed for teams. Signal has 1-to-1 and small group video. It's not built for team standups, client presentations, or 100-person all-hands.
No AI. Signal doesn't transcribe calls, summarize meetings, or answer questions from your conversation history. Phound does all three on Pro.
No admin controls. Signal has no way for an IT manager to provision team accounts, manage a shared number, or offboard a departing employee.
Requires a real phone number to sign up. Signal needs your personal number at registration. Phound only needs an email — your personal number stays private from day one.

Picking the right tool

Which one fits your team?

Use Signal if…

Your priority is the most transparent, open-source encryption available
You're messaging people who already have Signal installed
You don't need to call clients, run team meetings, or get AI summaries
You want a 100% free, nonprofit app with no paid tiers

Use Phound if…

Your team needs to call clients on regular phone numbers, not just other app users
You want encrypted messaging plus video meetings for up to 100 (free) or 500 (Pro) people
You want AI to summarize calls, transcribe voicemails, and answer questions from conversation history
You need a real business phone number without giving clients your personal cell
You want to sign up with just an email — no personal phone number required
You need team admin controls, shared numbers, or broadcast messaging (Business tier)

The wider field

Signal, Wire, Element, Mattermost — and Where Phound Fits

If you've been comparing Signal alternatives, you've probably encountered Wire, Element, and Mattermost. All three are excellent at encrypted team messaging — and none of them have a real business phone system.

Wire

E2E encrypted messaging and calls, business-focused. No real phone number, no AI, limited video meeting scale.

Element (Matrix)

Decentralized, open-source encrypted messaging. Powerful for technical teams, complex to set up and manage. No phone system or AI.

Mattermost

Open-source team messaging platform, self-hostable. Excellent for dev teams. No phone number, no AI, no video meetings built in.

Phound sits in a different lane: encrypted messaging plus a complete business phone system, video meetings, and AI — in one app, starting free. Need a private number without an app? See the Burner alternative →

Common questions

Phound vs. Signal — Common Questions

Both Phound and Signal are end-to-end encrypted — your messages and calls are private in both apps. Signal uses the open-source Signal Protocol, which is independently auditable. Phound uses its own proprietary E2E encryption system. For teams that also need a real business phone number, video meetings, AI call summaries, and the ability to reach anyone — not just app users — Phound adds those capabilities alongside encryption.

Phound and Signal solve different primary problems. Signal is purpose-built for private messaging using the most widely trusted open-source encryption standard, and it excels at that. Phound is built for teams that need encrypted messaging plus real phone numbers, video meetings for up to 500 participants, AI summaries, and the ability to call clients who aren't on the app. Teams that use Signal for personal conversations often use Phound for work.

Signal works for small teams that only need to message each other and already have Signal installed. It has no video meetings designed for teams, no way to call clients who aren't on Signal, no AI features, no admin controls, and no business phone numbers. Teams that start on Signal often outgrow it when they need to communicate with people outside the app.

Both apps have free tiers. Signal is entirely free, funded by nonprofit donations. Phound Basic is free with unlimited Phound-to-Phound calls, video meetings up to 100 participants, P2P messaging, and basic AI meeting summaries. Phound Pro adds a real PSTN phone number, SMS, and advanced AI for $9.99 per user per month. Phound Business adds team management and shared numbers for $18 per user per month.

No. Phound Basic requires only an email address — no personal phone number needed to create an account. Signal requires a real phone number to register. If you want to keep your personal number private, Phound lets you start with just an email. A dedicated business phone number can be added later with Phound Pro.

Both prioritize privacy through end-to-end encryption. Signal's open-source Signal Protocol has been independently audited and is considered the gold standard for private consumer messaging. Phound uses proprietary E2E encryption. For pure privacy with open-source transparency, Signal leads. For teams that need privacy alongside business phone features, AI, and video meetings, Phound delivers encryption without the feature trade-offs.

Phound adds: a real PSTN phone number callable from any phone (Pro); video meetings for up to 100 participants free and 500 on Pro; AI call summaries, meeting Q&A, and voicemail transcription (Pro); SMS to any number in North America (Pro); team admin controls and shared numbers (Business); Wave broadcast messaging (Pro/Business); and signup with email only — no phone number required.